diff --git a/single-repository.yaml b/single-repository.yaml
new file mode 100644
index 00000000..52a12760
--- /dev/null
+++ b/single-repository.yaml
@@ -0,0 +1,37 @@
+schema_version: 1
+kind: single-repository-record
+
+# ===========================================================================
+# single-repository.yaml — this project STAYS A SINGLE REPOSITORY, recorded.
+#
+# OPTIONAL, AND NEVER OWED. The Triad — an assembly root with a spec leg and
+# a code leg — is the PREFERRED project shape (openxFactory
+# `prefer-triad-project-shape`, ratified by Brett Heap on 2026-10-06), and a
+# person starting work here is told so once. This file is how a project that
+# has DECIDED to stay in one repository says so, once, and stops meeting that
+# advisory. A project that writes nothing owes nothing and is reviewed
+# identically.
+#
+# IT CONFERS NOTHING. No gate, no floor, no grant, no clearance eligibility,
+# no lifecycle state and no review difference. Its only reader is
+# openRepoShape's Triad advisory; no review lane, required check, validator,
+# floor, council or merge gate reads it.
+#
+# HOW TO USE IT. Copy this file to the repository's ROOT as
+# `single-repository.yaml`, replace every value in double braces below, and
+# commit it like any other change. `revisit_on:` is optional — delete its line if
+# there is nothing to revisit. The schema is openRepoShape's
+# `contracts/single-repository-record.yaml`. Converting to the Triad later is
+# `adopt-project.py`, run by a person deciding for the project; nothing
+# converts on this file's account, and nothing reads `revisit_on:` but people.
+# ===========================================================================
+
+# The person who decided, for this project, that it stays single.
+decided_by: "Brett Heap"
+
+# The day they decided it, as YYYY-MM-DD.
+decided_on: "2026-10-11"
+
+# Why, in a sentence: a configuration repository, an aggregation, a vendored
+# fork, a project too small to split.
+reason: "openRepoShape is the standard itself: its rules (README, AGENTS.md, contracts) and the tools that apply them change together in one reviewed commit, and every project pins one commit of it."
diff --git a/tests/test_shape_advisory.py b/tests/test_shape_advisory.py
index 211df69e..64183f99 100644
--- a/tests/test_shape_advisory.py
+++ b/tests/test_shape_advisory.py
@@ -21,6 +21,9 @@
   * a `single-repository.yaml` that does not parse, or declares another
     kind, silences nothing and is REPORTED beside the advisory, failing
     nothing;
+  * this repository is one of them: its own root carries the record Brett
+    Heap decided on 2026-10-11 (#337), so the standard's own checkout is not
+    advised either;
   * it writes nothing, records nothing, and is read by the three tools and
     by no validator, template script or workflow.
 
@@ -661,6 +664,39 @@ def test_the_schema_the_template_and_the_module_agree():
     assert shape_advisory.field_problems(parse_yaml(filled)) == []
 
 
+def test_this_repository_records_that_it_stays_single(quiet_env):
+    """#337: openRepoShape is not a Triad and says so, once, in its own root.
+
+    Brett Heap decided on 2026-10-11 that this repository stays a single
+    repository, so the doctor gave every session that began work in this
+    checkout the advisory about the standard itself. The record is the
+    standard's own `single-repository.yaml`: it must be there, of the right
+    kind and with every field its schema asks for, and the doctor must not
+    give the advisory about it.
+
+    ASKED OF THE DISK, as the doctor asks, and of two readers: `read_record`
+    for the file alone, which cannot depend on what this checkout is called
+    or where it sits, and the doctor's own rows for what a person actually
+    meets. The second asks for no `advisory` row rather than for no
+    `triad-advisory` row at all, because a checkout cloned under a leg's name
+    is sent to its assembly root instead and that row is not the advisory.
+    Nothing here pins a value of the record: the day Brett Heap amends his
+    decision, the file changes and this test does not.
+    """
+    state, silences_nothing, notes = shape_advisory.read_record(REPO)
+    assert state == shape_advisory.RECORD_SILENCES, (
+        f"this repository's root has no {RECORD} of the right kind: "
+        f"{state}, {silences_nothing}")
+    assert notes == [], (
+        f"this repository's {RECORD} departs from "
+        f"{shape_advisory.RECORD_SCHEMA}: {notes}")
+
+    _, rows, _ = doctor_json(REPO, quiet_env)
+    assert all(row["status"] != "advisory" for row in rows.values()), (
+        "the doctor still gives this repository the Triad advisory: "
+        f"{rows.get(ROW)}")
+
+
 @pytest.mark.parametrize("field, value, problem", [
     ("decided_on", "06/10/2026", "not an ISO date"),
     ("decided_on", "2026-02-30", "not an ISO date"),